Charmonium near the deconfining transition on the lattice

Abstract

We study the charmonium properties at finite temperature using quenched lattice QCD simulations. Although a simple potential model analysis indicates no bound state at $T>1.05T_c$, our analyses of the spatial correlation between quark and anti-quark and the spectral function indicate that a bound-state-like structure may survive even above $T_c$.Comment: 4 pages, 3 figures, Talk presented at the PANIC02 conference, Sept. 30 - Oct. 4, 2002, Osaka, Japa

Heavy Quarkonium in Extreme Conditions

“…Refs. [215,216,103,217,218]), which allows them to deploy large grids and recently even perform continuum extrapolations (see Ref. [219]).…”

J/ψ production in a gluon plasma produced in Au–Au collisions at

“…Further inclusion of shadowing will decrease the number of charm quarks produced and lower the number of J/ψ's produced. Color screening [4,67,68,69] will lead to more dissociation of J/ψ and more suppression of final J/ψ yield. The inclusion of feeddown will lead to the same effect as higher charmonium resonances are easier to be dissociated.…”

Quarkonium Spectral Function from Anisotropic Lattice

“…Matsui and Satz [1] proposed that color screening at high temperature will lead to quarkonium suppression, which can be used as a signal of QGP formation. Studies of modification of quarkonium potential in terms of spectral functions have started to appear only recently [2][3][4][5]. However, the systematic errors were not well controlled and it is not clear which features of the charmonium spectral functions are physical and which are lattice artifacts of the MEM analysis and/or finite lattice spacing.…”